Lighting unit



FIG. 1 is a front isometric view thereof;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof, the bottom view being the same;

FIG. 4 is a left side elevation view thereof, the right side elevation being the same;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a rear isometric view thereof. 

The ornamental design for a lighting unit, as shown and described. 